U.S. Marines in garrison across the world will officially change over into green woodland utility uniforms, Nov. 7. Marines are required to wear the desert Marine Corps Combat Utility Uniform with sleeves up during the warm months of the year and woodland MCCUU with sleeves down during the cold months that normally coincide with the changing to and from daylight-saving times. - U.S. Marines in garrison across the world will officially change over into green woodland utility uniforms, Nov. 7. Marines are required to wear the desert Marine Corps Combat Utility Uniform with sleeves up during the warm months of the year and woodland MCCUU with sleeves down during the cold months that normally coincide with the changing to and from daylight-saving times.